Arthur (Peter Gallagher) has got some 'splaining to do now that he has resigned from the DPD on Covert Affairs as his Colombian scandal begins to unravel. On Tuesday's episode (9/8c, USA), he'll attempt to do so with Annie (Piper Perabo), meeting with her the only way a disgraced CIA agent would — breaking into her house and sitting in the dark, as Annie walks in with a gun.